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Multi-dimensional vibration screening test bench based on the theory of parallel mechanism was designed to solve the problem that multi-dimensional vibration could not be attained by traditional vibration screening device. This multi-dimensional vibration screening test bench took fully decoupled multi-dimensional main exciting mechanism as center, and adopted highpower linear motor as linear reciprocating vibration power source. It had the characteristics of shorter driving chain and convenient adjustment of mechanical structure and motion parameters to obtain material pellets vibration performance under several conditions and motion law of material on the screen. The test bench used computer and PMAC control card as the core of hardware control system. Measurement and control software system could collect real-timely, display, process and analyze the amplitude, velocity, frequency, torque and power to provide the design basis of multi-dimensional vibration equipment.